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Heavy Rain in the Southern Appalachians; Fire Weather and Heat in the West; Monitoring Tropical Storm Erin

Heavy to excessive rainfall over the southern Appalachians may bring areas of flooding today. Gusty winds and low relative humidity will bring critical fire weather conditions to parts of the Great Basin and northern Rockies today and Thursday. Hot to extremely hot temperatures are in place through today across parts of the western U.S. Read More >

Overview

A QLCS-like line of storms quickly developed ahead of a blob of decaying convection that was moving northeast in southern MN. These new storms formed within a narrow corridor of uncapped, moderate MLCAPE with very high MLCAPE values in the lowest 3 km. While bulk shear magnitudes were borderline, the 0-3 km shear was normal to the line of storms, signaling some possibility of QLCS tornadoes. As the line of storms traveled through the Twin Cities, 5 EF0 tornadoes were confirmed in the southeast metro. Numerous trees were uprooted or broken and a few structures were damaged. Strong winds also caused damage and a 61 mph wind gust was measured at the grandstand of the Minnesota State Fair.

 

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